<template>
  <div ref="wrapper" class="wrapper">
    <div>
      <slot></slot>
    </div>
  </div>
</template>

<script>
  import BScroll from "better-scroll";

  export default {
    name: "Scroll",
    data() {
      return {
        scroll: null,
      };
    },
    props: {
      probeType: {
        type: Number,
        default: 0
      },
      pullUpLoad: {
        type: Boolean,
        default: false
      }
    },
    mounted() {
      this.scroll = new BScroll(this.$refs.wrapper, {
        probeType: this.probeType,
        pullUpLoad: this.pullUpLoad,
        click: true
      });
      if (this.probeType === 2 || this.probeType === 3) {
        this.scroll.on('scroll', position => {
          this.$emit('scroll', position)
        })
      }
      if (this.pullUpLoad) {
        this.scroll.on('pullingUp', () => {
          this.$emit('pullingUp')
        })
      }
    },
    methods: {
      scrollTo(x, y, time = 500) {
        this.scroll.scrollTo(x, y, time)
      },
      finishPullUp() {
        this.scroll.finishPullUp()
      },
      refresh() {
        this.scroll.refresh()
      },
      getScrollY() {
        return this.scroll.y
      }
    }
  };
</script>

<style scoped>
  .wrapper {
    overflow: hidden;
  }
</style>